They rest not day and night.
Rev 4:8 (KJV)
O blessed rest! When we rest not day and night, saying, “Holy, holy,
holy, Lord God Almighty!” –when we shall rest from sin, but not from worship;
from suffering and sorrow, but not from joy! O blessed day, when I shall rest
with God; when I shall rest in knowing, loving, rejoicing, and praising; when
my perfect soul and body shall together perfectly enjoy the most perfect God; when
God, who is love itself, shall perfectly love me, and rest in His love to me,
and I shall rest in my love to Him; when He shall rejoice over me with joy, and
joy over me with singing, and I shall rejoice in Him!—Baxter